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run code in 200+ php & hhvm versions
<?php $test = "this is a test (asdfasdfasdf)"; $asdf = preg_replace("\s*\(.*\)\s*$", "", $test); var_dump($asdf);
Output for 7.1.25 - 7.4.0beta2
Warning: preg_replace(): Delimiter must not be alphanumeric or backslash in /in/0MUIe on line 5 NULL